JP2888603B2 - Surface sheet for absorbent articles - Google Patents

Surface sheet for absorbent articles

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Publication number
JP2888603B2
JP2888603B2 JP2134440A JP13444090A JP2888603B2 JP 2888603 B2 JP2888603 B2 JP 2888603B2 JP 2134440 A JP2134440 A JP 2134440A JP 13444090 A JP13444090 A JP 13444090A JP 2888603 B2 JP2888603 B2 JP 2888603B2
Authority
JP
Japan
Prior art keywords
coating layer
nonwoven fabric
surface
projections
topsheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2134440A
Other languages
Japanese (ja)
Other versions
JPH0434082A (en
Inventor
正樹 村上
裕範 野村
Original Assignee
ユニ・チャーム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Priority to JP2134440A priority Critical patent/JP2888603B2/en
Publication of JPH0434082A publication Critical patent/JPH0434082A/en
Application granted granted Critical
Publication of JP2888603B2 publication Critical patent/JP2888603B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

Description: TECHNICAL FIELD The present invention relates to a surface sheet of an absorbent article, and more particularly, to a nonwoven fabric as a base material for forming a skin contact surface of an absorbent article such as a sanitary napkin. Related to topsheet.

[Prior art and its problems] Conventionally, in absorbent articles such as sanitary napkins, for the purpose of spot absorption of bodily fluids on the skin surface, reduction of residual bodily fluids and improvement of dry feeling, the surface of a nonwoven fabric as a topsheet is It is known that a hydrophobic resin having a required pattern is formed by partially applying a hydrophobic resin. However, in this case, since the hydrophobic film is located on the surface of the nonwoven fabric and substantially flush with the surface of the nonwoven fabric, the liquid-permeable portion where the film is not located and the nonwoven fabric is exposed is also a liquid-impermeable portion. And adheres to the wearer's skin in the same manner as the hydrophobic coating. Therefore, stuffiness tends to occur between the topsheet and the skin, and the bodily fluid absorbed inside the napkin flows backward and easily exudes from the surface of the topsheet. For this reason, it gives the skin a moist feeling, and thus a discomfort.

On the other hand, in absorbent articles such as sanitary napkins, it is known that for substantially the same purpose as that of the article, an aperture is formed in a hydrophobic resin film and a bodily fluid introduction pipe projects from the lower surface thereof. I have. However, in this case, when a body pressure is applied during use, the body fluid introduction tube may be deformed or closed, and it may be difficult or impossible to introduce the body fluid.

An object of the present invention is to provide a surface sheet of an absorbent article that can eliminate the above-mentioned defect by arranging and forming a convex portion as a liquid-impermeable portion and a concave surface as a liquid-permeable portion in a required pattern. It is in.

[Means for solving the problem]

In order to achieve the above object, the topsheet according to the present invention is formed by arranging a number of hollow convex portions and a series of continuous concave portions that are independent of each other and have a bottom opening in a liquid-permeable nonwoven fabric containing thermoplastic fibers in a required pattern. A thermoplastic and hydrophobic coating layer is integrally fusion-bonded to the top surface of the projection, and the height of the projection not including the coating layer is not higher than the bottom surface of the recess, and the coating is formed. Make the area ratio of the layer 10-80%,
The height of the projections including the coating layer is 0.5 to 3 mm. [Operation] In the topsheet according to the present invention having the above configuration, when used as a topsheet of an absorbent article, the top of the projections The hydrophobic coating layer located on the surface comes into contact with the skin. At the same time, the bodily fluid in the concave portion as the liquid-permeable portion between the convex portions is transmitted, and at the same time, the bodily fluid in the film layer flows into the concave portion, passes through the concave portion, and is absorbed inside the article.

When the body pressure is applied, the convex portion of the topsheet in this portion may be dented or crushed, but is restored when the body pressure is released. Thus, the topsheet has cushioning properties. Of course, in the liquid-permeable portion, even if the convex portion is dented or crushed under the body pressure, this does not hinder the transmission of the body fluid.

〔Example〕

An embodiment of the topsheet according to the present invention will be described below with reference to the drawings.

In FIG. 1 and FIG. 2, the nonwoven fabric 2 containing thermoplastic fibers is embossed under heating to form a large number of hollow projections 3 which are independent of each other and have an open bottom surface, and a series of continuous depressions 5. The hydrophobic coating layer 4 is formed on the top surface of the convex portion 3.
Are integrally fused to form the topsheet 1.

As the nonwoven fabric 2, a melt-bonded nonwoven fabric, a spun-bonded nonwoven fabric, or another nonwoven fabric can be used. Non-woven fabric 2
It is preferable to contain 10% or more of thermoplastic fiber in order to maintain its shape by embossing under heating and to measure the fusion bonding strength of the coating layer 4 to the projection 3. The nonwoven fabric 2 is treated with a surfactant, if necessary, or is mixed with a constituent fiber to improve the permeability of body fluid. In general, the basis weight and apparent thickness of the nonwoven fabric 2 may be 5 to 50 g / m 2 and 0.5 to 1.5 mm, respectively.

As shown in the figure, it is necessary that the height of the convex portion 3 not including the coating layer 4 is higher than the bottom surface of the concave portion 5 in order to obtain a required height. The interval I between the projections 3 is 0.5 to 5 mm, and the height of the projections 3 including the coating layer 4, that is, the height H between the upper surface of the coating layer 4 and the bottom of the recess 5 is 0.5 to 3 mm. When the area ratio of the coating layer 4 is set to 10 to 80%, the permeation of the bodily fluid in the concave portion 5 is improved. On the other hand, when the bodily fluid absorbed by the absorbent body flows back into the concave portion 5 and exudes, It is preferable in order to minimize contact between the exuded body fluid and the skin.

The thickness of the coating layer 4 is not particularly limited as long as it can cover the top surface of the projection 3 and does not impair the flexibility of the nonwoven fabric 2.

In order to obtain the surface sheet 1, for example, while the nonwoven fabric 2 is embossed under heating, a thermoplastic resin film such as polyethylene biaxially stretched is superposed under tension on the upper surface of the nonwoven fabric 2. Apply hot air to the film. Doing so softens the entire film,
The film portion in contact with the top surface of the convex portion 3 is fused, and the film portion located on the concave portion 5 is contracted and drawn to the convex portion 3 to form the coating layer 4. Also,
Instead of this method, it is also possible to form the coating layer 4 by applying a resin to the top surface of the convex portion 3 in a state where the nonwoven fabric 2 is applied to one surface of the pair of surface uneven rolls providing the convex portion 3. it can.

As shown in FIG. 3, for example, as shown in FIG. 3, the topsheet 1 having the above-described configuration has the liquid-impermeable sheet 7 positioned on the lower surface and side surfaces of the absorber 6, and the whole of the laminate is topsheet 1 In FIG. 3, the projections 3 and the depressions 5 are not shown) and are used to compose a sanitary napkin.

〔The invention's effect〕

According to the topsheet according to the present invention having the above-described configuration and action, the body fluid hardly remains in the hydrophobic coating layer on the top of the convex portion having a specific area ratio, interval, and height and independent from each other. Therefore, it is possible to minimize the feeling of wetness and stickiness given to the skin.

Each convex portion is hollow with an open bottom surface and has cushioning properties, so that it has an excellent skin contact feeling and easily recovers even if deformed.

In addition, since the concave portion as the liquid-permeable portion between the convex portions does not hinder the liquid-permeating function due to the deformation of the convex portion, the body fluid can be sufficiently transmitted.

[Brief description of the drawings]

FIG. 1 is a plan view of a part of a topsheet according to an embodiment of the present invention. FIG. 2 is an enlarged sectional view of the topsheet. FIG. 3 is a partially cutaway perspective view of a sanitary napkin to which the topsheet is applied. DESCRIPTION OF SYMBOLS 1 ... Top sheet, 2 ... Nonwoven fabric 3 ... Convex part, 4 ... Coating layer 5 ... Concave part, I ... Interval H ... Height

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) A61F 13/54 A61F 13/15

Claims (1)

(57) [Claims]
1. A liquid-permeable nonwoven fabric containing thermoplastic fibers, in which a number of hollow projections and a series of continuous depressions which are independent from each other and have an open bottom surface are arranged and formed in a required pattern. A plastic and hydrophobic coating layer is integrally bonded by fusion bonding, the height of the projections not including the coating layer is made higher than the bottom of the recess, and the area ratio of the coating layer is 10 to 80%.
A surface sheet of an absorbent article, wherein the height of the projections including the coating layer is 0.5 to 3 mm.
JP2134440A 1990-05-24 1990-05-24 Surface sheet for absorbent articles Expired - Lifetime JP2888603B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2134440A JP2888603B2 (en) 1990-05-24 1990-05-24 Surface sheet for absorbent articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2134440A JP2888603B2 (en) 1990-05-24 1990-05-24 Surface sheet for absorbent articles

Publications (2)

Publication Number Publication Date
JPH0434082A JPH0434082A (en) 1992-02-05
JP2888603B2 true JP2888603B2 (en) 1999-05-10

Family

ID=15128409

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2134440A Expired - Lifetime JP2888603B2 (en) 1990-05-24 1990-05-24 Surface sheet for absorbent articles

Country Status (1)

Country Link
JP (1) JP2888603B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8030535B2 (en) * 2002-12-18 2011-10-04 The Procter & Gamble Company Sanitary napkin for clean body benefit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN168576B (en) * 1986-05-30 1991-05-04 Chicopee
JPH03130478A (en) * 1989-10-16 1991-06-04 Daiwabou Kurieito Kk Production of complex sheet
JP2974715B2 (en) * 1990-02-15 1999-11-10 ライオン株式会社 Water-permeable sheet body and method for producing the same

Also Published As

Publication number Publication date
JPH0434082A (en) 1992-02-05

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